{{Short description|American aircraft engine}} {{Use mdy dates|date=January 2022}} {{Use American English|date=January 2022}} <!-- This article is a part of Wikipedia:WikiProject Aircraft. Please see Wikipedia:WikiProject Aircraft/page content for recommended layout. --> {{infobox aero engine | name= EA 81 | image= | caption= |engine_type=Aircraft engine |manufacturer=Stratus 2000, Inc |designer= |national_origin=United States |first_run= |major_applications={{ubl|Airdale Backcountry|Zenith CH 601}} |produced= |number_built= |developed_from= |variants_with_their_own_articles= }} The '''Stratus EA 81''' is an American aircraft engine, produced by Stratus 2000 of Corvallis, Oregon, for use in homebuilt aircraft.<ref name="WDLA11">Bayerl, Robby; Martin Berkemeier; et al: ''World Directory of Leisure Aviation 2011-12'', pages 240-243. WDLA UK, Lancaster UK, 2011. ISSN 1368-485X</ref>
==Design and development== The engine is based on the Subaru EA 81 automotive engine. It is a four-cylinder, four-stroke, {{convert|1800|cc|cuin|1|abbr=on}}, liquid-cooled, gasoline engine design with a belt-type reduction drive with a reduction ratio of 2.2:1. It employs electronic ignition and produces {{convert|100|hp|kW|0|abbr=on}} at 5400 rpm.<ref name="WDLA11"/>
The company seems to have gone out of business in 2008, and production ended.<ref>{{cite web|url=https://web.archive.org/web/*/http://stratus2000.homestead.com/|title=Stratus 2000 |website=Internet Archive Wayback Machine |access-date=1 July 2015}}{{cbignore}}</ref> <!-- ==Operational history== --> <!-- ==Variants== -->
==Applications== *Airdale Backcountry<ref>{{cite web|url = http://www.airframer.com/direct_detail.html?company=123536|title = Stratus 2000 Inc. (U.S.A.) |access-date = 1 July 2015|work = Airframer|year = 2015}}</ref> *Cessna 150<ref>{{cite web|url=http://www.homebuilt.org/vendors/powerplants/stratus.html|title=Homebuilt Homepage - Vendors - Powerplants - Stratus|work=homebuilt.org|access-date=2 July 2015}}</ref> *Zenith CH 601<ref>{{cite web|url=http://www.zenithair.com/zodiac/6-subaru.html|title=Subaru Power!|work=zenithair.com|access-date=1 July 2015}}</ref> <!-- ==Survivors== --> <!-- Engines on display== -->
==Specifications (EA 81) == {{pistonspecs| |ref=World Directory of Leisure Aviation 2011-12<ref name="WDLA11"/> |type=Four-cylinder, four stroke aircraft engine |bore={{convert|92|mm|in|1|abbr=on}} |stroke={{convert|67|mm|in|1|abbr=on}} |displacement={{convert|1800|cc|cuin|1|abbr=on}} |length={{convert|660|mm|in|1|abbr=on}} |diameter= |width={{convert|533|mm|in|1|abbr=on}} |height={{convert|444|mm|in|1|abbr=on}} |weight={{convert|84|kg|lb|1|abbr=on}} |valvetrain= |supercharger= |turbocharger= |fuelsystem= |fueltype=gasoline |oilsystem= |coolingsystem=liquid |power={{convert|100|hp|kW|0|abbr=on}} at 5400 rpm |specpower= |compression=9:1 |fuelcon= |specfuelcon= |oilcon= |power/weight=
|designer= |reduction_gear=belt-type reduction drive, reduction ratio 2.2:1
|general_other= |components_other= |performance_other= }}
==See also== {{aircontent <!-- include as many lines are appropriate. additional lines/entries with carriage return. --> |see also=*Stratus EJ 22 |related=<!-- related developments --> |similar aircraft=<!-- similar or comparable aircraft --> |lists= *List of aircraft engines }}
==References== {{Reflist}} <!-- ==External links== -->
Category:Stratus aircraft engines Category:1990s aircraft piston engines Category:Four-cylinder engines Category:Liquid-cooled aircraft piston engines Category:Gasoline engines by model